APA2603A Datasheet, PDF (1/28 Pages) Anpec Electronics Coropration – 2.8W Stereo Class-D Audio Power Amplifier and Class AB Headphone Driver

APA2603A
2.8W Stereo Class-D Audio Power Amplifier and Class AB Headphone
Driver (DC Volume Control, UVP, AGC Function)
Features
General Description
• Operating Voltage: 3.3V-5.5V
•
High
Efficiency
85%
at
P =2.8W,
O
4Ω
Speaker,
V_DD=5V
• Filter-Free Class-D Amplifier
• Low Shutdown Current
- I_DD=1µA at V_DD=5V
• 64 Steps Volume Adjustable from -80dB to
+20dB by DC Voltage with Hysteresis
• AGC (Non-Clip) Function
- Disable : 0.45VDD~VDD, Floating
- Max, Power : GND
• UVP Function
- Disable : Floating
• Output Power at THD+N=1%
BTL Mode
2.25W
at
V =5V,
DD
R_L=4Ω
1.3W
at
V =5V,
DD
R_L=8Ω
SE Mode
68mW
at
V =5V,
DD
R_L=32Ω
Output Power at THD+N=10%
2.8W at V_DD=5V, R_L=4Ω
1.6W at V_DD=5V, R_L=8Ω
• Less External Components Required
• Two Output Modes Allowable with BTL and SE
Modes Selected by SE/BTL Pin
• Input Signal and Headphone Output Signal in
Phase
• Thermal and Over-Current Protections with
Auto-Recovery
• Power Enhanced Packages SOP-24(300mil), Dip-
24(300mil)
• Lead Free and Green Devices Available
(RoHS Compliant)
Applications
The APA2603A is a stereo, high efficiency, filter-free Class-
D audio amplifier available in a SOP-24 package.
The APA2603A provide the precise DC volume control,
the gain range is from +20dB (V
=0V) to -80dB
VOLUME
(V_VOLUME=5V) with 64 steps precise control. It’s easy to get
the suitable amplifier’s gain with the 64 steps gain setting.
The filter-free architecture eliminates the output filters
compared to the traditional Class-D audio amplifier, and
reduces the external component counts and the compo-
nents high, it could save the PCB space, system cost,
simplifies the design and the power loss at filter.
APA2603A provides an AGC (Non-Clip) function, and this
function can low down the dynamic range for large input
signal. APA2603A can provide from 20dB to -80dB with 64
steps gain decrease for non-clipping function, and this
function can avoid output signal clipping.
The APA2603A also integrates the de-pop circuitry that
reduces the pops and click noises during power on/off or
shutdown enable process.
The APA2603A has build-in over-current and thermal pro-
tection that prevent the chip being destroyed by short cir-
cuit or over temperature situation.
APA2603A combines a stereo bridge-tied loads (BTL)
mode for speaker drive and a stereo single-end (SE)
mode for headphone drive into a single chip, where both
modes are easily switched by the SE/BTL input control
pin signal.
APA2603A is capable of driving 2.8W at 5V into 4Ω
speaker. The efficiency can archived 85% at R_L=4Ω when
P_O=2.8W at V_DD=5V.
APA2603A is capable of driving 60mW at 5V into 32Ω
Headphone
• LCD TVs
• DVD Player
• Active Speakers
ANPEC reserves the right to make changes to improve reliability or manufacturability without notice, and
advise customers to obtain the latest version of relevant information to verify before placing orders.
Copyright © ANPEC Electronics Corp.
1
Rev. A.6 - Mar., 2013
www.anpec.com.tw